Dough-mixing machine.



B. D. PINKNEY.

DOUGH MIXING MACHINE.

APPLICATION FILED ocT.2s, I917.

1,265,375, Patented May 7, 1918.

E9. 1. 7 7 I B ip/M W/fnesses s rairns BRYAN D. PINKNEY, OF CINCINNATI,OHIO, ASSIGNOR TO THE TR'EUMPH IMANUFAC TUBING CGMPANY, OF

CINCINNATI, OHIO, A COBPGBATIGN U1 GHIO.

DOUGH-MIXING MACHINE.

Application filed October 25, 1917.

To all whom 2'2? may concern:

Be it known that I, BRYAN D. PINKNEY, a citizen of the United States,residing at Cinoinnati, in the county of Hamilton of Ohio, have inventeda new and useful Dough-Mixing Machine, of which the ollowing is aspecification.

My invention relates to improvements in machines for theemixing and thelmeading of dough, and similar masses of a doughy or plastic nature inwhich a plurality of rotating arms comprise the agitator; and theobjects oi: my improvement are, first, to subject the contents to'athorough and uniform mixing, causing the dry and liquid ingredients tobecome correctly blended and mixed, and then to assume the form of apartially cohesive mass; and second, by the continued action of theagitator, to so completely knead and stretch the dough or plastic massby means of a relative accelerated agitator speed, that plenty of air isbeaten in and the desired chemical action soon results, causing thegluten to be fully developed and the mass to prove well and make a finergrained, whiter, and larger loaf for the weight,

I attain these objects by the mechanism illustrated. in the accompanyingdrawings, in

an view of my improved averse section taken at i; 3, a transverse seemeB-l3, Fig. 1. 1 numerals refer to similar parts throng, out the severalviews.

Referring to the drawings, the frame 1 supports the bowl or receptacle2, constructed to receive the ingredients to be mixed and mounted w thap 3, in the frame 1, so that can Leo forward to discharge the mixed iThe tilting may be done in suitable manner, such as by means of achordal wormtheel attached to the bowl trunnion, me with a worm 5,suitably mounted on shaft 6, operated by power or means by means of ahandgitator comprises apair of blades or 2121x111 arm 8, and an innerstretchmg arm 9; said inner Specification of Letters Patent.

and State )Patentcd may i, time.

Serial No. 198,369.,

and pinion 13 an idler gear 17 is intermeshed and mounted on stud 18,which causes the gear 11 to rotate in an opposite direction to gear 10.This, in turn, causes the outer mixing arm 8 and the inner kneading andstretching arm 9 to rotate in opposite direo tions, so that, forexample, it the arm 8 retates twenty-five times per minute in the onedirection and the arm 9 rotates twenty-five times per minute in theopposite direction, there will be a relative speed of fifty rotationsper minute between them. T he outside diameter of arm 8 is greater thanthe outside of arm 9, hence the peripheral speed of its diameter isgreater than the peripheral speed of the diameter of arm 9 for the samenumber of rotations minute, New is very desirable to have as littlespeed or: the arm 8 as is consistent, in or or to reduce the temperatureof the batch w ile mined, and yet it correct miztn By rotating the 9 inthe opposite direction tear-m 8, while the outer arm 8 makes, forexample, but twentyfive turns per minute, the inner arm 9 makes, forexample, twenty-five turns per minute in the opposite direction, so thatbetween them there is arelative speed of fifty rotati ons per minute. Bythe outer arm 8 rotating at a lower velocity causes very little friction(in iei ence to the receptacle 2), and so the te )tifZzilliG is'lreptvery low. It is desirable ti -.t the temperature of the dough whilebeing mixed shall not exceed eighty-two degrees, ii ahrenheit. i havefound from experience that it is preferable to impart an acceleratedopposing speed to i must have suificient speed to do The outer or mixingper minute than "the outer arm op osite direction.

he outer or mixing arm 8 comprises a pair of end members or spiders 8, 8rotatably mounted on shafts 19, 20, on which said shafts are mounted thegears 10, 1]..

arm 8 is rigidly connected to shaft 19, by means of a key or pin 21, androtates idly on shaft 20, said shaft 20 rotating in an oppositedirection to shaft 19. The part of arm 8 that rotates idly on shaft 20is provided with a stufling-box of any familiar construction, or abushin 22, with suitable lubricating connections 0 familiarconstruction, hence not shown in the drawing. The arms of spiders 8 '8",are staggered, and placed relatively opposite, and connected at theircontiguous ends with bar 8 and bar 8 in an opposing direction, so thatwhen the bar 8 is rotated in the direction, of the arrow (see Fig. 1) itwill move the ingredients to the left of the bowl or receptacle 2, andbar 8 will move the ingre- .dients to the right. I have shown bar 8straight throughout its entire length and bar 8 curved to conform to thecurved shape of the bowl 2, and to work in close proximity with saidcurved portion of bowl 2 to serve as a scraper for each completerotation of the arm 8, although bar 8 may be curved to conform to thecurved shape of the bowl 2 to act as a scraper, if more scraping actionin the bowl is necessary.

he inner or kneading and stretching arm 9 comprises a pair of endmembers or spiders 9, 9", rotatably mounted on 8, and in an gears 10,11. The inner or kneading and stretching arm 9 is rigidly connected toshaft 20, by means of a key or pin 23, and

. rotates idly on shaft 19, said shaft 19 roi 9, connect the oppositetating in an opposite direction to shaft 20. The part of arm 9 thatrotates idly on shaft 19 is provided with a stufling-box of any amiliarconstruction, or a bushing 24, with suitable lubricating connections offamiliar construction. hence not shown in the drawing. The spiders 9, 9are arranged in the same plane, that is, they are not staggered, eachend member 9, 9", having one long part and one shorter part. and areplaced diametrically opposite. The. connecting bars 9, ends of spiders9*, 9 in an opposing direction so that the direction of bar 9 divergestoward the axis of rotation to the right, and bar 9 diverges toward theaxis of rotation to the left. The

bars 9, 9", may be straight throughout their length as shown in curvedslightly.

Fig. 1, or they may be In the bowl trunnions of receptacle 2 arestuffing boxes of familiar construction, or bushing 25, 26, withsuitable lubricating shafts 19, 20, on which said shafts are mounted theconnections of familiar construction, hence not shown in the drawing.

The operation of my improved dough mixing machine is as follows: Theingredients to be mixed (usually for bread doughs, which comprise flour,salt, sugar, lard, yeast and Water) are placed in receptacle 2 eitherjust before the dough mixing machine is operated. or'while it is beingoperated. The ingredients generally are such that must firstf be blended(which blending takes place in the mixing process before the ingredientsassume the form of a cohesive mass), and then kneaded and stretched. Thebars 8 and 8", on account of their side thrusat action while rotating.work the unmixe ency that they will yield to the kneading and stretchingaction of bars 9 and 9*, in connection with bars 8 and 8", thestretching taking place due to the opposite rotations of the outer'arm 8and the inner arm 9. This process produces the desired chemical actionand develops the gluten, and makes a dough of maximum strength in aminimum of time, and at a comparatively low temperature.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent. is

1. 1n a dough mixing machine, the combination comprising a receptacle,an agita-- tor therefor, said agitator being composed of an outer mixingpart and an inner kneadin part arranged to rotate concentrically withinsaid receptacle. said outer part being provided with oppositely disposedspiders and an oppositely composed pair of thrust mixer bars connectingthe outer contiguous ends ofthe spiders, and arranged to travel in closeproximity to the curved wall of the receptacle; said inner kneading partbeing provided with oppositely disposed spiders and an oppositelvcomposed pair of in weirdly-diverging kneader bars arranged to rotatewithin said outer mixer part; and means for imparting an opposite rotaryspeed to the inner kneading part of the agitator. substantially asdescribed.

2. In a dough mixing machine, the combination comprising a receptacle,an agitator therefor, said agitator being composed of an outer mixingpart and an inner kneading part, arranged to rotate concentrically inthe opposite direction within said receptacle, a driving shaft connectedto one end of the outer mixing part, the opposite end of the outermixing part to rotate idly on the driving shaft of the inner kneadingpart (if the agitator, a driving shaft connected to one end of part, theopposite end of the inner.

portion of the ingredients back and forth until they are of suiiicientconsist-- said inner beading kneadmeeme ing part to rotate idly on filedrivingsheft In teatimony WhEEE'QOf I have hereunte se; of the outermixing part, pf the agitator, my hand in presence of twe subeeribiiigwit gearhmechamsm fOXiiflPflI'tlD rotary speed messes. to t e agitatoran means or running in W 1 reverse directi n to the outer mixing partERYAIQ Flkmm the inner kneading part; fer the purpose of Witnesses: bothmixing and. kneadmg the ingredients, CHAS. W, MUEWR,

substantially as described. Howmn Gnosmmiu

